CN103051344B - A kind of number transmission transmitter - Google Patents
A kind of number transmission transmitter Download PDFInfo
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- CN103051344B CN103051344B CN201310025681.2A CN201310025681A CN103051344B CN 103051344 B CN103051344 B CN 103051344B CN 201310025681 A CN201310025681 A CN 201310025681A CN 103051344 B CN103051344 B CN 103051344B
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Abstract
The invention discloses a kind of number transmission transmitter, described transmitter comprises: crystal oscillator, produces stabilizied reference frequency; Octamonic amplifier, carries out frequency multiplication and amplification by described reference frequency, produces carrier signal; Data source, producing can the data-signal of octave speed; Level translator, carries out level conversion to described data-signal; Modulator, by the data signal modulation after described level conversion in described carrier signal, generates modulated signal; Filter, the out of band signal component of filtering modulated signal; Power amplifier, the modulated signal of out of band signal component carries out power amplification by described filtering, forms power amplified signal; Filter amplifier carries out detection amplification to described power amplified signal, generating power level indicating signal; The invention solves the problem that transmitter single-frequency point and cbr (constant bit rate) transmit, achieve data rate can variable, the modulation signal stability of octave adjustment, frequency of carrier signal high with phase noise the beneficial effect such as low.
Description
Technical field
The present invention relates to electrical communication technology, particularly a kind of number transmission transmitter.
Background technology
In the communication of reality, transmission channel is all bandpass-type, i.e. transmission band signal in the channel band of regulation.Number transmission transmitters are the necessarieses of transfer of data in radio communication, its Core Feature be digital baseband signal is modulated to sine wave carrier signal on become band signal.The design of number transmission transmitter needs the design factor of consideration three aspect: carrier frequency, data rate and modulation system.
The determination of carrier frequency is exactly clear and definite transmission channel.In satellite communication, conventional transmission channel has uhf band, L frequency range, S frequency range and X frequency range.General several transmission transmitters are only operated in a certain frequency in a certain frequency range.
Data rate characterizes the speed of transmission of digital baseband signal.Many employings high data rate transmission during the more and broader bandwidth of transmission channel of data volume, and many employings low speed data rate transmission when data volume is less or the bandwidth of transmission band is narrower.General severals transmission transmitters are with a fixing data rate transport.
The modulation system of digital baseband signal has a variety of: if be called amplitude-shift keying (ASK) by the modulation system of digital baseband signal control carrier amplitude; The modulation system controlling carrier frequency is called frequency shift keying (FSK); The modulation system controlling carrier phase is called phase shift keying (PSK); The modulation system jointly controlling carrier amplitude and phase place two parameters is called quadrature amplitude modulation (QAM).
Because the data rate of existing several transmission transmitter and carrier frequency are normally fixing, be therefore necessary to improve existing several transmission transmitter.
Summary of the invention
In order to overcome the defect of prior art, the invention discloses a kind of number transmission transmitter, the data rate that can reach transmission is variable, and the carrier frequency of transmission is also variable.
The invention discloses following technical scheme:
A kind of number transmission transmitter, described several transmission transmitter comprises:
Crystal oscillator, produces stabilizied reference frequency;
Octamonic amplifier, carries out frequency multiplication and amplification by described reference frequency, produces carrier signal;
Data source, producing can the data-signal of octave speed;
Level translator, carries out level conversion to described data-signal;
Modulator, by the data signal modulation after described level conversion in described carrier signal, generates modulated signal.
Preferably, described several transmission transmitter also comprises filter, the out of band signal component of described filter filtering modulated signal.
Preferably, described several transmission transmitter also comprises power amplifier, and the modulated signal of described power amplifier out of band signal component by described filtering carries out power amplification, forms power amplified signal.
Preferably, described several transmission transmitter also comprises detector amplefier, and described filter amplifier carries out detection amplification to described power amplified signal, generating power level indicating signal.
Preferably, described data source adopts frequency synthesis device, or is carried in Field Programmable Gate Array with VHDL, Veriglog Programming with Pascal Language and realizes.
Preferably, described octamonic amplifier is one in frequency multiplication of phase locked loop amplifier, triode octamonic amplifier, diode octamonic amplifier or its combination.
Preferably, described modulator is ASK modulator, FSK modulator, BPSK modulator, qpsk modulator or QAM modulation device.
Preferably, described crystal oscillator is constant-temperature crystal oscillator, temperature compensating crystal oscillator or VCXO.
Compared with prior art, the present invention has the following advantages:
Several transmission transmitter provided by the invention, owing to taking above-mentioned technical scheme, can realize the transmission of variable-data-rate and variable carrier frequency.The frequency of crystal oscillator is 10MHz, octamonic amplifier select with can the phase-locked loop chip of digital programmable be the phase-locked loop circuit of core by the reference frequency frequency multiplication of 10MHz to 500MHz, external control signal 2 adjusts the configuration of phase-locked loop chip, can adjust the output frequency of phase-locked loop circuit in relative broad range.Data source adopts Field Programmable Gate Array, and such as FPGA device realizes, and the data rate of output can increase progressively by the multiple with 2 from 1bps, and the peak of output data rate depends on the maximum operating frequency of FPGA device.External control signal 1 can adopt transmission means that is parallel or serial, for adjusting output data rate.The invention solves several transmission transmitter only in the problem of a certain frequency transmission fixed code speed data, achieve the beneficial effects such as transmission carrier wave is adjustable, transmitted data rates is adjustable.
Accompanying drawing explanation
Fig. 1 is the theory diagram of specific embodiment of the invention number transmission transmitter;
Fig. 2 is the theory diagram that specific embodiment of the invention octamonic amplifier adopts frequency multiplication of phase locked loop.
embodiment:
Below with the drawings and specific embodiments, the present invention will be further described:
Embodiment
Please refer to Fig. 1, Fig. 1 is the theory diagram of specific embodiment of the invention number transmission transmitter, and as shown in Figure 1, several transmission transmitter provided by the invention comprises:
Crystal oscillator 1, for generation of stabilizied reference frequency, can be constant-temperature crystal oscillator (OCXO), temperature compensating crystal oscillator (TCXO) or VCXO (VCXO).
Octamonic amplifier 2, be connected with crystal oscillator, the input signal of crystal oscillator is carried out, namely described reference frequency carries out frequency multiplication and amplification, the carrier frequency of adjustable output under the effect of external control signal 2, its working method can be one in frequency multiplication of phase locked loop amplifier, triode octamonic amplifier, diode octamonic amplifier or its combination.
Data source 3, for generation of can the data-signal of octave rate of change.Data source 3 can adopt frequency synthesis device, or is carried in Field Programmable Gate Array with VHDL, Veriglog Programming with Pascal Language and realizes.
Level translator 4, is connected with data source, and the signal level for data source being produced is converted to the level needed for modulator.
Modulator 5, be connected with level translator with octamonic amplifier, by the data signal modulation after described level conversion in described carrier signal, generate modulated signal, its working method can be ASK modulator, FSK modulator, BPSK modulator, qpsk modulator or QAM modulation device.
Described several transmission transmitter also comprises following element:
Filter 6, is connected with modulator, the out of band signal component of the modulated signal that filtering modulator exports.
Power amplifier 7, is connected with filter, and by described filtering, the modulated signal of out of band signal component carries out power amplification, row success rate amplifying signal.
Detector amplefier 8, is connected with power amplifier, and modulated the transmitting of part is carried out to power detection and amplified generating power level indicating signal.
Further the course of work of a kind of variable frequency of the present invention and data rate number transmission transmitter is described below:
The occasion of uncertain factor is there is at data transmission link, such as communicate between moon surface detector device, the distance between rover and lander or the change of aerial angle can cause the path loss between rover and lander and received signal level to produce larger change.When path loss between rover and lander communication link increases or incoming level declines, ensure that the unimpeded needs of communication link suitably reduce transmission frequency or reduce the data rate of transmission, and the distance between rover and lander communication link reduces and when needing to transmit larger data amount, need the data rate suitably increasing transmission.
Adjustment transmission frequency adjusts carrier frequency exactly.Carrier frequency is that the reference frequency frequency multiplication produced by crystal oscillator amplifies generation.Octamonic amplifier design adopts frequency multiplication of phase locked loop, triode frequency multiplication, diode frequency multiplication or wherein two or three frequency multiplication amplifying circuit realization.
As Fig. 2, the frequency of crystal oscillator is 10MHz, adopts phase-locked loop chip and VCO to carry out frequency multiplication, then amplifies with amplifier and exports.Phase-locked loop chip has a variety of, can be PE3236, ADF4110, ADF4252.Phase-locked loop chip can receive outside control command and arrange parameters such as the frequency dividing ratios of its inside, realizes the adjustment of output frequency.VCO has wider rate-adaptive pacemaker scope, the signal controlling that its output frequency exports by phase-locked loop chip.
Namely adjustment message transmission rate utilizes external control signal 1 to adjust the data rate of data source generation.Data source produces base-band data signal, can adopt frequency synthesis device, or is carried in Field Programmable Gate Array with VHDL, Veriglog Programming with Pascal Language and realizes.Data source adopts Field Programmable Gate Array, and such as FPGA device realizes, and the data rate of output can increase progressively by the multiple with 2 from 1bps, and the peak of output data rate depends on the maximum operating frequency of FPGA device.External control signal 1 can adopt transmission means that is parallel or serial, for adjusting output data rate.
In sum, the present invention proposes a kind of variable frequency and data rate number transmission transmitter.Utilize product of the present invention, when external control signal 1 inputs adjustment data source outputting data signals speed or external control signal 2 inputs adjustment transmission frequency, frequency and the bit rate of number transmission transmitter can change within the specific limits, it is high that design adopts constant-temperature crystal oscillator output to have stability through the carrier signal that frequency multiplication of phase locked loop amplifier produces, the advantage that phase noise is low.
Be only several specific embodiments of the application above, but the application is not limited thereto, the changes that any person skilled in the art can think of, all should drops in the protection range of the application.
Claims (5)
1. a number transmission transmitter, is characterized in that, described several transmission transmitter comprises:
Crystal oscillator, produces stabilizied reference frequency;
Octamonic amplifier, carries out frequency multiplication and amplification by described reference frequency, produces the carrier signal of variable frequency;
Data source, producing can the data-signal of octave speed;
Level translator, carries out level conversion to described data-signal;
Modulator, by the data signal modulation after described level conversion in described carrier signal, generates modulated signal;
Described several transmission transmitter also comprises filter, power amplifier, detector amplefier, the out of band signal component of described filter filtering modulated signal; The modulated signal of described power amplifier out of band signal component by described filtering carries out power amplification, forms power amplified signal; Described detector amplefier carries out detection amplification to described power amplified signal, generating power level indicating signal.
2. several transmission transmitter according to claim 1, is characterized in that, described data source adopts frequency synthesis device, or is carried in Field Programmable Gate Array with VHDL, Veriglog Programming with Pascal Language and realizes.
3. several transmission transmitter according to claim 1, is characterized in that, described octamonic amplifier is one in frequency multiplication of phase locked loop amplifier, triode octamonic amplifier, diode octamonic amplifier or its combination.
4. several transmission transmitter according to claim 1, is characterized in that, described modulator is ASK modulator, FSK modulator, BPSK modulator, qpsk modulator or QAM modulation device.
5. several transmission transmitter according to claim 1, is characterized in that, described crystal oscillator is constant-temperature crystal oscillator, temperature compensating crystal oscillator or VCXO.
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| CN201310025681.2A CN103051344B (en) | 2013-01-22 | 2013-01-22 | A kind of number transmission transmitter |
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| CN201310025681.2A CN103051344B (en) | 2013-01-22 | 2013-01-22 | A kind of number transmission transmitter |
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| CN103051344B true CN103051344B (en) | 2016-01-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099537A (en) * | 2014-05-08 | 2015-11-25 | 中国科学院空间科学与应用研究中心 | Digital transmission sender used for satellite |
| CN107547138B (en) * | 2017-08-16 | 2020-01-07 | 华东师范大学 | Frequency multiplication factor tunable phase encoding signal optical generating device and method |
| CN108649973B (en) * | 2018-03-14 | 2020-01-14 | 湖北楚航电子科技有限公司 | Multi-channel data transmission transmitter and combined data transmission transmitting device |
| CN111371466A (en) * | 2020-03-09 | 2020-07-03 | 珠海格力电器股份有限公司 | A communication method, device and system that can improve the communication rate per unit time |
| CN111988049B (en) * | 2020-08-28 | 2021-03-30 | 华北电力大学 | Block chain information security management platform |
| CN114173240A (en) * | 2021-11-16 | 2022-03-11 | 科大讯飞股份有限公司 | Pairing method, receiver, wireless microphone and wireless microphone system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540616A (en) * | 2009-05-06 | 2009-09-23 | 中国科学院光电研究院 | Satellite-borne data transmission transmitter using microwave direct modulation technique |
| CN102710316A (en) * | 2012-01-15 | 2012-10-03 | 中国电子科技集团公司第十研究所 | All-digital satellite signal simulated source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2473814Y (en) * | 2001-04-26 | 2002-01-23 | 梁群 | Crystal oscillation frequency regulation radio emitter |
| CN1538625A (en) * | 2003-04-19 | 2004-10-20 | 世代通信（深圳）有限公司 | Software defined radio frequency receiving and transmitting message machine |
| US20100182947A1 (en) * | 2008-11-26 | 2010-07-22 | Je-Hong Jong | Method and system of providing link adaptation for maximizing throughput in mobile satellite systems |
| EP2545652B1 (en) * | 2010-03-12 | 2018-02-28 | Sunrise Micro Devices Inc. | Power efficient communications |
| CN202406104U (en) * | 2011-11-22 | 2012-08-29 | 北京振兴计量测试研究所 | Frequency modulation telemetering transmitter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540616A (en) * | 2009-05-06 | 2009-09-23 | 中国科学院光电研究院 | Satellite-borne data transmission transmitter using microwave direct modulation technique |
| CN102710316A (en) * | 2012-01-15 | 2012-10-03 | 中国电子科技集团公司第十研究所 | All-digital satellite signal simulated source |
Non-Patent Citations (1)
| Title |
|---|
| 上海航天;何维忠;《上海航天》;19911231;第7-8页 * |
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